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Cannot connect to Cisco PIX 501

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deepsand

Unfortunately, unless you can get the old IT company to produce the access code, you're sunk re. reconfiguring it, unless you can find someone whose has expertise in cracking Cisco PIXs; that's why the new company replaced it with a new unit.

However, you may still be able to use it. If it was originally used as a gateway, odds are that the internal IP address assigned to it is within a fairly narrow range of commonly used addresses.

The 3 blocks reserved for private, i.e. local networks are

10.0.0.0 - 10.255.255.255
172.16.0.0 - 172.31.255.255
192.168.0.0 - 192.168.255.255

Also, IP addresses in the range of 169.254.0.0 -169.254.255.255 are reserved for Automatic Private IP Addressing.

If you know, or can find out, the range of IP addresses used by the LAN from which this PIX was used, we can deduce the most likely address(es) assigned to it.